LED Traffic Lights Signal Module / Digital Signal Output Traffic Light Module

A 5V LED Traffic Light Signal Module is a ready-to-use module designed to simulate a real traffic light, typically used in electronics projects and educational setups. It usually has Red, Yellow, and Green LEDs mounted on a small PCB, often labelled and arranged vertically like real traffic lights.

Technical Specifications:

• Operating Voltage: 5V DC
  
• LED Colours: Red, Yellow (Amber), Green
  
• Interface Pins: 4-pin header: R, Y, G, GND
  
• Compatibility: Arduino, ESP8266, ESP32, Raspberry Pi, etc.
  
• Control Type: Digital (LOW = OFF, HIGH = ON)
  
• Current Consumption: ~20mA per LED (with built-in resistors)
  
• Resistors: Built-in current limiting resistors (~220–330Ω)

Pinouts:

Connection with Arduino:

Sample code:

int redPin = 2;
int yellowPin = 3;
int greenPin = 4;

void setup() {
  pinMode(redPin, OUTPUT);
  pinMode(yellowPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
}

void loop() {
  // Red ON
  digitalWrite(redPin, HIGH);
  delay(3000);
  digitalWrite(redPin, LOW);

  // Green ON
  digitalWrite(greenPin, HIGH);
  delay(3000);
  digitalWrite(greenPin, LOW);

  // Yellow ON
  digitalWrite(yellowPin, HIGH);
  delay(1000);
  digitalWrite(yellowPin, LOW);
}